Post SMTP <= 3.0.2 - Unauthenticated Stored Cross-Site Scripting

{
  "id": "958098a7fb3788a5a346bd28dafb5de80ba1db7e2853b7d47cef258b14181aa3",
  "url": "https://osv.dev/vulnerability/CVE-2025-0521",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Post SMTP <= 3.0.2 - Unauthenticated Stored Cross-Site Scripting",
    "summary": "The Post SMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the from and subject parameter in all versions up to, and including, 3.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
    "evidence": "osv:CVE-2025-0521",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-0521",
      "aliases": [
        "CVE-2025-0521"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wpexpertsio/post-smtp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "07a6b179650224fc5d3a119f3623ec12f4031194"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.1",
            "3.0.0",
            "3.0.0-rc.1",
            "3.0.0-beta.1",
            "2.9.9",
            "2.9.8",
            "2.9.7",
            "2.9.6",
            "2.9.5",
            "2.5.9-beta.1",
            "2.9.3",
            "2.9.2",
            "2.9.1",
            "2.9.0",
            "2.8.8",
            "2.8.7",
            "2.8.5",
            "2.8.4",
            "2.7.0",
            "2.8.3",
            "2.7.2",
            "2.6.0",
            "2.5.9.4",
            "2.5.9.3",
            "2.5.8",
            "2.5.7",
            "2.5.6",
            "2.5.5",
            "2.5.4",
            "2.5.3",
            "2.5.2",
            "2.5.1",
            "2.5.0",
            "2.5-rc.3",
            "2.5-rc.2",
            "2.5-rc.1",
            "2.5-beta.1",
            "2.4.3",
            "2.4.2-beta.2",
            "2.4.2",
            "2.4.1",
            "2.4",
            "2.4-beta.1",
            "2.3.1",
            "2.3",
            "2.2.1",
            "2.2",
            "2.2-beta.2",
            "2.1.8",
            "2.1.7",
            "2.1.6",
            "2.1.4",
            "2.1.4-rc.2",
            "2.1.4-rc.1",
            "2.1.4-beta.1",
            "2.1.2",
            "2.1.2-rc.2",
            "2.1.2-rc.1",
            "2.1.2-beta-1",
            "2.1.1.1",
            "2.1.1",
            "2.1",
            "2.1-beta.1",
            "2.0.27",
            "2.0.26",
            "2.0.25-beta.1",
            "2.0.25",
            "2.0.24",
            "2.0.23",
            "2.0.22",
            "2.0.21",
            "2.0.20",
            "2.0.19",
            "2.0.18",
            "2.0.17",
            "2.0.16",
            "2.0.15",
            "2.0.14",
            "2.0.13",
            "2.0.12",
            "2.0.11",
            "2.0.10",
            "2.0.9",
            "2.0.8",
            "2.0.7",
            "2.0.6",
            "2.0.5",
            "2.0.4",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "v1.9.8",
            "v1.9.7",
            "v1.9.6",
            "v1.9.5",
            "v1.9.4",
            "v1.9.3",
            "v.1.9.2",
            "v.1.9.1",
            "v.1.9.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-0521.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.880360846Z",
      "provider": "osv",
      "references": [
        "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3237626%40post-smtp%2Ftrunk&old=3229076%40post-smtp%2Ftrunk&sfp_email=&sfph_mail=",
        "https://www.wordfence.com/threat-intel/vulnerabilities/id/366dfbf1-870c-4ce3-abc4-a2b2f4e72175?source=cve",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/0xxx/CVE-2025-0521.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-0521"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "Wordfence",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "3.0.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/0xxx/CVE-2025-0521.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-0521",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491604,
  "published_at": "2025-02-18T11:10:18.504+00:00"
}